@book{Volckart2004,
author = {Volckart, Oliver and Wolf, Nikolaus},
year = {2004},
isbn = {3-935058-91-8},
language = {eng},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Estimating medieval market integration},
url = "http://dx.doi.org/10.17169/FUDOCS_document_000000000464",
}